Any host root access remediation

Using Console

Using CLI

To remediate the misconfiguration “Root User Should Not Be Accessible From Any Host” for GCP using GCP CLI, follow these steps:

Open the Google Cloud Console and navigate to the GCP project where the misconfiguration exists.
Open the Cloud Shell by clicking on the icon in the top right corner of the console.
Run the following command to list all the users in the project:

gcloud iam users list

Identify the root user in the list. The root user will have the email address format username@<project-id>.iam.gserviceaccount.com.
Run the following command to remove the root user’s access from all hosts:

gcloud compute firewall-rules create deny-root-access --direction=INGRESS --priority=1000 --action=DENY --rules=all --source-ranges=0.0.0.0/0 --target-tags=root-access

Run the following command to create a new firewall rule that allows access to all users except the root user:

gcloud compute firewall-rules create allow-all-except-root --direction=INGRESS --priority=1000 --action=ALLOW --rules=all --source-ranges=0.0.0.0/0 --target-tags=allow-all

Run the following command to add the root-access tag to the root user’s account:

gcloud compute instances add-tags <instance-name> --tags=root-access

Replace <instance-name> with the name of the instance where the root user has access.

Run the following command to remove the root-access tag from all other instances:

gcloud compute instances remove-tags <instance-name> --tags=root-access

Verify that the root user no longer has access to any instances in the project.

By following these steps, you can remediate the misconfiguration “Root User Should Not Be Accessible From Any Host” for GCP using GCP CLI.

Using Python

To remediate the misconfiguration “Root User Should Not Be Accessible From Any Host” in GCP using python, follow these steps:

First, you need to authenticate to GCP using a service account key file. You can create a service account and download the key file from the GCP console.

Here’s an example code snippet to authenticate using a service account key file:

from google.oauth2 import service_account

# Path to the service account key file
KEY_FILE_LOCATION = '/path/to/key/file.json'

# Authenticate using the key file
credentials = service_account.Credentials.from_service_account_file(KEY_FILE_LOCATION)

Next, you need to use the google-cloud-iam library to list all the IAM policies for your GCP project.

Here’s an example code snippet to list all the IAM policies:

from google.cloud import iam_v1

# Create a IAM client object
client = iam_v1.IAMClient(credentials=credentials)

# The resource name of the project to list the IAM policies
resource_name = 'projects/my-project-id'

# List all the IAM policies for the project
response = client.list_iam_policies(request={'resource': resource_name})

# Print the IAM policies
for policy in response:
    print(policy)

Once you have the IAM policies, you need to find the policy that grants the roles/owner role to the user:root member.

Here’s an example code snippet to find the policy that grants the roles/owner role to the user:root member:

# Find the policy that grants the roles/owner role to the user:root member
for policy in response:
    for binding in policy.bindings:
        if binding.role == 'roles/owner' and 'user:root' in binding.members:
            print('Found policy: {}'.format(policy))

Finally, you need to remove the user:root member from the policy that grants the roles/owner role.

Here’s an example code snippet to remove the user:root member from the policy that grants the roles/owner role:

from google.iam.v1.iam_policy_pb2 import Policy

# Get the policy that grants the roles/owner role to the user:root member
policy_to_update = None
for policy in response:
    for binding in policy.bindings:
        if binding.role == 'roles/owner' and 'user:root' in binding.members:
            policy_to_update = policy
            break

# Remove the user:root member from the policy
policy_to_update.bindings = [binding for binding in policy_to_update.bindings if 'user:root' not in binding.members]

# Update the policy
update_request = {
    'policy': policy_to_update,
    'update_mask': {'paths': ['bindings']}
}
client.set_iam_policy(request={'resource': resource_name, 'policy': update_request})

Note: This code snippet is just an example and may need to be modified depending on your specific use case. Please refer to the GCP documentation for more information on how to use the google-cloud-iam library.

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GCP Threats

Any host root access remediation

Triage and Remediation

Remediation

GCP Introduction

GCP Pricing

GCP Threats

GCP Misconfigurations

Resources

GCP Threats

​Triage and Remediation

​Remediation

Triage and Remediation

Remediation